When someone soaks up spilled beer with a napkin and proceeds to ring it out into their mouth, similar to a shamwow. It is often performed by two parties - one is the ringer and the other is the drinker.

Note: this is a variation of the popular solution to spilled beer: "zamboni"

Ross spilled his beer so I soaked it up w/ a napkin and gave him a shamwow shot. Everyone was disgusted and impressed at the same time.